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Hi, thanks for the design. I can't get the duct to stay snugly in place. i realize it's meant to be adjustable, but it's just sliding down below the nozzle. I've tried M3x8 and M3x12. The threads are there, its just not tightening like the 4010 fan threads. It's printed in petg. Everything fits well, and the circles are all as they should be, not oval or anything as far as I can tell. Any thoughts or suggestions? I just put a 5015 on after making sure everything fit. It seemed tight enough at first. Thanks (edit: Duh, that space is for a nut. I'll leave this here in case someone else doesn't realize. I just thought, oh that's so I can see what I'm doing. :(